| A | B |
|---|
| Absorb | To take in |
| Amplify | To make stronger |
| Bullhorn | An instrument with a built-in microphone that makes sound louder |
| Concave Lens | A lens that is thinner in the middle that at the edges |
| Convex Lens | A lens that is thicker in the middle than at the edges |
| Electric Signal | A form of engery |
| Hearing Aid | An instrument used tohelp people with a hearing problem hear better |
| Microphone | An instrument used to amplify voices, music, and other sounds |
| Opaque | Does not allow light to pass through |
| Pitch | The highness of lowness of a sound |
| Reflect | To bounce off |
| Stethoscope | An instrument used to hear the sounds of body organs |
| Translucent | Allows light to pass through byt scatters it so that whatever is behind it cannot be clearly seen |
| Transmit | To allow to pass through |
| Transparent | Allows light to pass through so that whatever is behind can be seen |
| Vibrate | to move quickly back and forth |
| Visible spectrum | Light energy that can be seen and can be broken into the colors of the rainbow |
| Volume | te loudness of softness of a sound |
| Wavelenght | The distance from a point on a wave to the same point on the next wave |
| Graphic Source | A drawing, photograph, table, chart, or diagram that shows information visually |
